Polycarbonate Lenses Problems

While glass was the only real choice in the early days of vision correction, it poses several problems. Glass lenses are effective at improving vision, but they’re heavy and easy to break.

• You’re bound to be offered multiple choices for lens materials, mostly, high index and polycarbonate.
• Check the spots where they touch their face once in awhile to be sure their skin isn’t irritated.
• Hoya is another prescription eyeglasses manufacturer that offers Trivex lenses, especially their Phoenix-based products.
• While glass lenses don’t scratch easily they are twice as heavy as plastic lenses.
• The eyeglass lens is split into two sections; the upper part is for distance vision and the lower part for near vision.

The refractive index of high index plastic lenses ranges from 1.53 to 1 1.74. Those in the range of just one 1.53 to 1 1.59 are about 20% thinner than regular plastic lenses, whereas 1.74 high index lenses are about half the thickness of regular plastic lenses. Various high index lenses can be found today in various price points based on how much thinner they’re in comparison to regular plastic lenses. The lenses are classified by their “index of refraction” (or “refractive index”). After the lenses have already been made, they have to be installed in the eyeglass frame. They are then “Edged” or cut and formed to match precisely into the frame. It could be done at the lens laboratory, or in the optical store.

What Forms Of Lenses Are Available?

Clean your eyeglasses with water and a non-lint cloth, as necessary, to help keep them spot free and prevent distorted vision. If your child looks on the tops of these glasses or complains they can’t see using them, their prescription may be wrong. Go back to your optician or eye doctor and get it checked out. They’re usually prescribed for folks over 40 who can’t focus well anymore. That’s because of presbyopia, an age-related change that affects your eye’s lens.

professional. However, all the edging that’s done for Eyeglasses.com is done in a state-of-the-art lens laboratory. Whenever we ask our laboratory to accomplish the edging, it is done by an employee/tradesman that does at least hundreds of jobs per day. That person has a high skill and accuracy level that people have found to provide very high quality. Abbe value is a way of measuring the lens material’s dispersion of light. A lens with a minimal Abbe value causes a higher dispersion and results in unwanted chromatic aberration.
Polycarbonate is a type of plastic, which is often used in eyeglasses, CDs and DVDs, headlights, and plenty of other applications. A polycarbonate lens is strong and highly resistant to impact that means it is ideal for eyeglasses, which are generally vulnerable to getting broken.
Now that we’ve a brief history of plastic lenses why don’t we consider a few of its benefits and drawbacks. In this article, we will be discussing specifically plastic and polycarbonate eyeglasses and the major differences between both lens materials. This is a

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Professionals at ourZEISS VISION CENTER Decraene Kortrijk will undoubtedly be happy to discuss your alternatives with you, i.e. The quality and cost of a polycarbonate lens depend on the prescription.
In the event that you often experience glare when wearing your glasses, an anti-reflective coating can be a good choice. This lens coating is really a microscopically thin layer that prevents light from reflecting off of the front and back surfaces of one’s lenses.

If you are in your mid-40s or older, you probably have glasses with multifocal lenses, like bifocals or trifocals. These have two or more prescriptions to improve your vision. In the past, you can spot this type of lens by the line between your two sections. You may no longer need sunglasses, although they could not darken in your vehicle if the windshield blocks Ultra violet rays. Instead, scope out the most recent frames to give your face a fresh look.

However, unlike CR-39 basic plastic lenses, a scratch resistant coating is almost always standard as it is applied once the lenses are made. With higher refractive indexes, there are often more chromatic aberrations, meaning visual disturbances of light, that may be interpreted as blur by some. Chromatic aberrations are higher in polycarbonate lenses. The abbe value of polycarbonate is 30, the lowest of most lens materials rendering it the worst lens for optical clarity and integrity. For all those reasons Trivex may be the better choice in a mid-index lens. Trivex lenses certainly are a good option to polycarbonate lenses. Trivex is simply as impact resistant,